Loading... Please wait...


Our Newsletter

Accept Credit Cards

AEM Universal Programmable Engine Manement System EMS 4

List Price:
Your Price:
$843.34 (You save $210.84)
Calculated at checkout

Product Description


AEM’s EMS-4 Universal Standalone Programmable Engine Management System (part# 30-6905) is the ideal standalone Engine Management System for modified Powersports and four-cylinder race car applications. The EMS-4 was created using AEM's powerful Series 2 hardware and includes all of its advanced features without the unneeded ancillary components.


If you have modified your four-cylinder Powersports application beyond the factory ECU’s ability to control engine operation, or have a 4-cylinder race vehicle that does not require some of the advanced hardware features of an AEM Series 2 Plug & Play System, AEM’s EMS-4 provides complete engine control for the maximum power and reliability.


AEM’s EMS-4 provides complete engine control for small engines with up to 4 cylinders. The unit includes a 36-pin connetor that is specifically designed to operate in harsh environments. It is completely sealed and weather/shock proof, allowing it to be mounted anywhere. The EMS-4 works with MAG or HALL crank inputs and can directly drive smart coils or an external ignitor such as AEM’s 4-Channel Coil Driver (part # 30-2840).


Weather/Shock Proof Enclosure 36-Pin Connector specifically designed to operate in harsh environments




  • 4 Saturated Injector Drivers
  • 4 Coil Triggers
  • 8 General Purpose Inputs/Outputs
  • Mag or Hall Cam and Crank Inputs
  • O2 Input
  • Knock Input
  • 8 MB Internal Data Logger
  • VSS Hall Input
  • Can Data Stream
  • USB Comm Port
  • Compact (4.8" x 4.55" x 1.44"), weather/shock proof enclosure
  • Utilizes AEMTuner Interface Software
  • System is fully enabled and unlocked – Never pay for Upgrades
  • Context Sensitive Help Eases Tuning Process
  • Maps can be Password Protected by the Tuner to Prevent Unauthorized Usage Sharing
  • Data analysis using AEMdata software. Click HERE for more info on AEMdata!


Professional tuners will appreciate the ease of use and security features of Advanced Engine Management’s AEMTuner Software. AEMTuner software is Windows™ compatible (XP, Vista, Windows7), making the task of copying, viewing and manipulating data as simple as a click of the mouse. AEMTuner Software is infinitely adjustable and allows tuners to program virtually any combination of engine control, power adders and auxiliary devices, and accurately delivers proper amounts of fuel and correct ignition timing for any boost level or operating condition.


Additional AEMTuner Software features include:


  • Support Pane gives tuners context sensitive help and uses tuners’ actual calibrations to describe each function
  • Maps can be password protected by the tuner to prevent unauthorized usage or sharing
  • Internal conflict detection notifies tuner if obvious errors exist in assignment of inputs/outputs
  • Compare Calibrations allows tuners to graphically compare tables and maps for easy analysis
  • Workspaces are easily customizable and configurable
  • Colored tables and maps


To learn more about AEMTuner Software click here
To download the latest version of AEMTuner Software click here

AEM offers a Universal Wiring Harness (part# 30-2905-96) with color coded silk screened wires for ease of installation and an integrated fuze and relay panel. AEM also has sensors and a Plug & Pin Kit (part# 30-2905-0) available.


30-2905-96 Wiring Harness 30-2905-0 Plug & Pin Kit


AEM’s EMS-4 Universal Programmable Engine Management System is legal in California only for racing vehicles which may never be used upon a highway.


Find Similar Products by Category

Currency Converter

Choose a currency below to display product prices in the selected currency.

United States Minor Outlying Islands Default Currency
European Union EUR

Add to Wish List

Click the button below to add the AEM Universal Programmable Engine Manement System EMS 4 to your wish list.

You Recently Viewed...